John william ceaddock



No Model. 2 J. W. ORADDOOK.

2 DEVICE FOR THREADING PIPE. No. 579,222. R Patented Mar. 23, 1897.. 2

WITNESSES: v ENTOH 2 2 V @F nrromsrs.

sum.

Nrrn rarns Farsi DEVlCE FOR THREADING PIPE.

SPECIFICATION forming part of Letters Patent No. 579,222, dated March 23, 1897. Application filed March 25,1896. Serial No. 584,763. (No model.)

To (tZZ whom, it may concern.-

Be it known that I, JOHN YVILLIAM CRAD- DOCK, a citizen of the United States,and a resident of New York, in the county of New York and State of New York, haveinvented certain new and useful Improvements in Devices for Threading Pipes, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, in which similar letters of reference indicate corresponding parts.

This invention relates to machines for cutting screw-threads on pipes, rods, and similar articles, and the object thereof is to provide an improved machine of this class which is simple in construction and operation and whereby a thread may be quickly and easily cut on a pipe or rod.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in whicl1- Figure l is an end view of my improved machine, and Fig. 2 a side view thereof, parts of the construction being shown in section.

In the drawings forming part of this specification, A represents a table, frame, or other support, and mounted thereon is a vise or clamp B, having a central transverse circular opening or passage 5, through which a pipe, rod, or bar D is adapted to be passed, and mounted in the upper portion of the viseB is a vertically-movable screw-threaded rod D, which carries at its lower end a jaw CZ, which is preferably circular or segmental in form, and the upper end of the rod D is provided with a ring 61 Rigidly secured to one side of the table A is a bracket G, having vertical projecting side plates g, and mounted thereon is an arm H, which is provided at its upper end with a tubular head it, one end of which is screwthreaded, as shown by 72 and the arm H is held in the bracket G by a cross-bar 9 which passes through the vertical projcctim sides g at about the middle thereof, the said crossbar 9 being triangular in cross-section and being connected with said vertical side plates by a tongue -and groove construction, as clearly shown in Fig. 2.

Rigidly secured to the lower end of the arm G is an arm K, which projects at right angles thereto and which is provided at its outer end with a vertical arm 75, which is provided at its upper end with a ring-head 75*, through which passes a tubular sleeve M, the inner end of which is enlarged and screw-threaded,

its outer end with a crank R and on the central portion of which is mounted a gear-wheel S, which is adapted to operate in connection with the gear-wheel O on the tubular sleeve M.

The gear-wheel S is much longer than the gear-wheel O, or, rather, said gear-wheel S is much longer than the gear-wheel O is thick, and by reason of this fact the tubular sleeve M is free to move longitudinallywithout disconnecting the gear-wheel 0 from the gearwheel S, and the operation will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following statement thereof.

The tubular head h is provided with an ann ular flan ge or rim 7L3, with which the arm H is connected with the ring-head of the arm 1:, and is provided with outwardly-directed arms 70 which serve as means for handling the same when detached from the bracket or for any desired purpose in operating the machine.

Then it is desired to form a thread on a pipe, rod, or other article, the same is inserted through the vise B and passed through the tubular head h and through the tubular sleeve M. The die m which maybe of any desired form and which is provided with inwardlydirected cutting-points m is then connected with the end of the sleeve M, and the machine is operated by turning the crank R. The shaft P is turned by the crank R, and with it the gear S, which turns the gear-wheel O and the sleeve M, and as the sleeve M is turned it moves inwardly over the screw-threaded end of the tubular head h, and in this operation the required thread is formed on the end of the pipe or rod D.

Any desired number of dies m may be employed, and one may be substituted for another whenever desired, and by reason of this fact a thread of any desired pitch or character may be made, and, as will be apparent, this device is simple in construction and operation and perfectly adapted to accomplish the result for which it is intended, and my invention is not limited to the size, form, and exact construction and arrangement of the parts herein described, and I reserve the right i the lower end of the first arm, a vertical eX- tension of said horizontal arm provided with a head or ring, a sleeve in said head or ring having an enlarged interiorly-screw-threaded part to receive the screw-threaded part of the tubular head, a gear-wheel on the tubular sleeve, a transverse shaft mounted in the firstnamed arm and in the vertical extension of thehorizontal arm, a gear-wheel on said shaft, a crank to turn said shaft, and a die on the outer end of the tubular sleeve, all constructed arranged and adapted to operate in the manner set forth.

In testimony that I claim the foregoing as my invention, I have signed my name, in presence of the subscribing Witnesses, this 23d day of March, 1896.

JOHN VILLIAM CRADDOOK.

Witnesses:

O. GERsT, O. MILLIN. 

